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- W1878703617 abstract "We use a mapping of the multiband Hubbard model for ${mathrm{CuO}}_{3}$ chains in $R{mathrm{Ba}}_{2}{mathrm{Cu}}_{3}{mathrm{O}}_{6+x}(R=mathrm{Y}$ or a rare earth) onto a $tensuremath{-}J$ model and the description of the charge dynamics of the latter in terms of a spinless model, to study the electronic structure of the chains. We briefly review results for the optical conductivity and we calculate the quantum phase diagram of quarter filled chains including Coulomb repulsion up to that between next-nearest-neighbor Cu atoms ${V}_{2},$ using the resulting effective Hamiltonian, mapped onto an $mathrm{XXZ}$ chain, and the method of crossing of excitation spectra. The method gives accurate results for the boundaries of the metallic phase in this case. The inclusion of ${V}_{2}$ greatly enhances the region of metallic behavior of the chains." @default.
- W1878703617 created "2016-06-24" @default.
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- W1878703617 date "2003-05-22" @default.
- W1878703617 modified "2023-09-25" @default.
- W1878703617 title "Phase diagram of theCuO3chains inYBa2Cu3O6+xandPrBa2Cu3O6+x" @default.
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- W1878703617 doi "https://doi.org/10.1103/physrevb.67.172507" @default.
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